The three population density zones in India are high, moderate and low. They are stated below (i) The high population density zone, which has a population density greater than 500 persons per sq km, consists of the states Uttar Pradesh, Bihar, West Bengal and Kerala.(ii) The low density zone, which has a population density lesser than 100 persons per sq km consists of the states Arunachal Pradesh, Mizoram.(iii) The remaining states fall in the moderate population density zone with 250-500 persons living per sq km. e.g. Madhya Pradesh, Rajasthan and so on.